Improvement in saw-gummer



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WILLIA M NEWCOMB, OF JOH'NSONVILLE, NE W YORK.

Lette/rs Patent No. 87,191, lated February 23, 1869.

IMPRCVEMENT IN SAW-GUMMER.

The Schedule referred to in these Letters Patent and making part of the same.

To all'whom it may conce/m Be it known that I, WILLIAM NEwcoMB, of J ohnsonville, in the county of Rensselaer, in the State of New York, have invented a'new and improved Saw- Gummer; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the saxue,reference being hadto the accompanying drawing, forming part of 4this specification, in which drawving- Figure l represents a sectional front elevation of this invention.

Figure 2 is a rear elevation thereof.

Figure 3 is an end view ofthe same.

Similar letters indicate corresponding parts.

This invention consists in the arrangement of a burr, mounted on a shaft, which has its bearing in a radiusarm, to-Which a ibrating motion is imparted by a worm and worm-w eel, acting on a pinion, which'gears into a segmental rack in such a manner, that, by imparting to said burr a revolving motion, it also receives an automatic feed-motion in the required direction, and the operation of gumming a saw can be performed with ease and facility.

The invention consists a-lso in combining, with the radius-arm carrying the burr, a supporting-plate, which isprovided with screw-clamps, and with a gauge, in such a manner that the burr can be readily adj usted in the required position in relation to the saw-tooth to be gummed.

A represents a supporting-plate, of' slieet-n1etal or any other suitable material.

Thisplate is provided with two or more screw-clamps, a, and with a gauge, b, so'that said plate can be secured in the proper position on the saw to be gnmmed, as clearly shown in g. 2 of the drawing, where the saw is represented in red outlines.

The gauge b, in this example, consists of two setscrews, which bear on the edge of the tooth, but said gauge may be constructed in any otherdesirable manner.

The operation of gumming is effected by a burr, B, l

which is mounted on the end of a shaft, (l.

This shaft has its bearing in a radius-arm, D, which is connected to the supporting-plate A, by means 0f a pivot, c, so that itcan freely. swing in either direction. On the shaft G is mounted a worm, ll, which gears in a worm-wheel, e, mounted on a shaft, f. that has its bearing in a bracket, g, secured. to the radius-armv D,

(see fig. 1;) and on the end of the shaft fis fastened a A pinion, h, which gears into a segmental raok,"i. This rack is connected to the supporting-plate A, by a hinge-joint, j, (see fig. 3,) and it is subjected to the action of a spring, k, which serves to -keepsaid rack in gear with the pinion h.

When the supporting-plate has been adjusted on the saw-plate in the proper position, the shaft Cis turned, by means of a hand-wheel, l, mounted on it, as shown in fig. 3, and as the burr begins to act ou the tooth of the saw, it receives an automatic feed-motion, by the action `of the worm, worm-wheel, pinion, and segmental rack, and` thereby the operation of gumming the saw is effected with ease and facility.

WM. NEWCOMB.

purpose speciiied.

Witnesses n LEVI CLAPPER,

NAHUM NEWCOMB. 

